Lasta (Amharic: ላስታ) is a woreda (district) in the Semien Wollo Zone (North Wollo) of the Amhara Region of Ethiopia. It is bordered on the south by Meket woreda, on the west by Bugna woreda, on the north by Wag Hemra Zone, and on the east by Gidan woreda. Its major town is Lalibela, known for its monolithic churches. Lasta split off from the Bugna woreda.